解决方案尝试
先安装pyqt5依赖项：
1、更新python3.7
sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get upgrade
sudo apt-get autoremove
sudo apt-get install python3.7
sudo update-alternatives –install /usr/bin/python3 python3 /usr/bin/python3.7 2
sudo update-alternatives –config python3
sudo apt-get install python3.7-dev
sudo apt-get install libhdf5-dev
2、更新pip3：
sudo python3 -m pip install –upgrade pip
3、安装pyqt5的依赖项
sudo apt install pyqt5*
sudo apt install qt5-default qttools5-dev-tools
4、最后再安装pyqt5
sudo pip3 install pyqt5
sudo pip3 install pyqt5-tools
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